Re: [boost] Nullable types

Subject: Re: [boost] Nullable types
From: Andrew Hundt (athundt_at_[hidden])
Date: 2013-07-14 15:25:31

Though there is some difference between null and void, MPL provides a void
type. http://www.boost.org/doc/libs/1_54_0/libs/mpl/doc/refmanual/void.html

I think there may also be some type "na" or something to that effect used
to fill empty elements of a sequence to work around the lack of variadic
templates in C++03, but I couldn't find the exact reference in a cursory
search.

Cheers!
Andrew Hundt

On Sat, Jul 13, 2013 at 7:56 AM, Bjorn Reese <breese_at_[hidden]>wrote:

> It seems like different Boost libraries use different nullable types.
>
>   * Optional uses boost::none
>   * Tribool uses boost::logic::indeterminate_**keyword_t
>   * Tuple uses boost::tuples::null_type
>   * Variant uses boost::blank
>
> And there are possibly more.
>
> What are your opinions about unifying these?
>
> ______________________________**_________________
> Unsubscribe & other changes: http://lists.boost.org/**
> mailman/listinfo.cgi/boost<http://lists.boost.org/mailman/listinfo.cgi/boost>
>